TV funnyman MacAulay said yesterday: "I have just recorded a few lines for the song alongside Chris Hoy.

"All I had to say is, 'and louder' followed by another couple of lines - I just about managed it."

He joked: "I'm not sure how you could describe my performance - I suppose it was my own unique blend of singing and shouting."

All profits will go towards helping disadvantaged children in Scotland and it is hoped that the track will do even better than the version of Loch Lomond that the Tartan Army recorded for Children In Need last year with Runrig.

It reached No9 in the charts and sold more copies than the official Children In Need song by the Spice Girls.

BA - Brian Robertson - said: "The song is very close to my heart and the idea of re-releasing it for Children In Need struck the right chord.

"The new version allows us to breathe life into a song that has remained a positive and popular part of Scottish football culture and hopefully will help raise enormous amounts of money for Children In Need.

"We've all been delighted by the list of Scottish personalities willing to give their time and it's been a lot of fun doing so far.

"All we need is a truly heroic Scottish performance on the field on Saturday and the loudest rendition ever of We Have A Dream off it."

A BBC spokeswoman added: "We're delighted that BA Robertson has joined forces with the Tartan Army this year to raise money for Children In Need.

"We're really excited about its release next month.

"Every single sold will raise money to help disadvantaged children and young people across Scotland, so we are hoping the nation will get right behind it and give it their support."

The SFA have given full approval for the recording and it is likely that the track will be given a run-through before the match and then played at half-time with an MC leading the choir.

A spokesman for the SFA said: "It's great that the Tartan Army are getting involved with such a good cause and I'm sure they will be in great voice this Saturday."

BBC Scotland will have a team of sound engineers at Hampden for the big day.

The tapes of the crowd will then be taken for final mixing immediately after the match.

There will also be more recording and video footage shot at Glasgow's Renfrew Ferry venue, with a crowd of 800 fans, before the game.

It is hoped the single will be available to pre-order at HMV and Amazon as early as this weekend, with the single being released on Monday, November 10.

It will be broadcast live as part of the BBC's Children In Need programme on November 14.

The project is the brainchild of tartanarmy.com and is being handled by Scotland fan and The Edge marketing firm boss Ian McCaig, from Ayrshire.

He said: "After the unexpected success of last year's song, we felt we couldn't just leave it as a one-off."

For more info visit: www.tartanarmy.com You can listen to the original track on our player below: